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首页> 外文会议>National Seminar on "Application of Chemical Engineering for Utilisation of Natural Resources (CHEMINAR-2001)", Feb 16-18, 2001, Bhubaneswar >Kinetics of Leaching of Reduced Bangladesh Ilmenite in Sulphuric Acid Solutions
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Kinetics of Leaching of Reduced Bangladesh Ilmenite in Sulphuric Acid Solutions

机译：还原孟加拉孟加拉钛铁矿在硫酸溶液中的浸出动力学

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摘要

Ilmentie separated from the beach sands of Bangladesh and containing 24.2 per cent FeO, 33.0 per cent Fe_2O_3 and 39.5 per cent TiO_2 has been reduced in the as received in the as received condition by charcoal for a period of 4 hours at 1050 C. The reduced mass has then been leached in the temperature range of 30 - 75℃ for periods of up to 90 minutes in 1.6 - 2.4 sulphuric acid solutions. Leaching was carried out in a three-necked round-bottom flask fitted with a re-flex condenser. Heating was done by placing the flux on a thermostatically controlled hot-plate. During leaching the solution was continuously stirred by magnetic stirrer. The dissolution of iron was determined by pippeting out 10 ml of suspension from the flux at predetermined time-intervals, filtering out the insoluble residue and chemically analysing the supernatant solution for iron content. All the chemicals used were of analytical grade. Concentrated sulphuric acid was diluted to the desired concentration with distilled water. The effects of time, temperature and the concentration of acid in the leaching solution has been investigated. Attempts have also been made to identify the reaction mechanism and to determine and Arrhenius activation energy for the reaction.
机译：从孟加拉国的沙滩沙中分离出来的Imenteie，在1050℃的条件下，以木炭的状态还原了原样，其中FeO含量为24.2％，Fe_2O_3含量为33.0％，TiO_2含量为39.5％。然后在1.6-2.4的硫酸溶液中将物料在30-75℃的温度下浸出长达90分钟。浸出在装有反射冷凝器的三颈圆底烧瓶中进行。通过将助焊剂置于恒温控制的热板上进行加热。在浸出过程中，通过磁力搅拌器连续搅拌溶液。通过以预定的时间间隔从助焊剂中抽出10 ml悬浮液，过滤掉不溶的残留物并化学分析上清液中的铁含量来确定铁的溶解度。所有使用的化学药品均为分析纯。用蒸馏水将浓硫酸稀释至所需浓度。研究了时间，温度和浸出溶液中酸浓度的影响。还尝试鉴定反应机理并确定反应的阿累尼乌斯活化能。

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